After trying to bully the UFC newcomer around the cage, Hamilton (15-7 MMA, 3-5 UFC) caught a right hand that robbed him of his motor skills and gave Fortuna (9-1 MMA, 1-0 UFC) a highlight reel knockout.

The heavyweight bout was part of the main card of today’s UFC Fight Night 104 event at Toyota Center in Houston. It aired on FS1 following prelims on FS1 and UFC Fight Pass.

The action was over at the 3:10 mark of the opening frame as the referee stepped in to save Hamilton, who was in the midst of throwing an overhand right when he caught the punch that sent him face-first to the canvas. Hamilton righted himself only to stumble around the octagon until informed of what had happened.

Fortuna demonstrated a preview of coming attractions moments earlier when he landed a right hand that briefly stopped Hamilton in his tracks. Hamilton shrugged it off, but didn’t adjust to a blitzkrieg gameplan that involved getting in close and firing punches in the clinch. Although successful early on, the shot revealed a chink in his armor. When he came forward again with his right hand, Fortuna leapt into the pocket and landed the fight-ending punch.

Fortuna, who moved up from the light heavyweight division in his octagon debut, now has won six straight, while Hamilton drops to 1-3 in his past four outings.